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Finding the Fourth Proportional to 162.09, 223.47 and 129.30

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Solution

The fourth proportional to 162.09, 223.47 and 129.30 is: 178.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.09 : 223.47 = 129.30 : x
  2. Step 2: Convert to fraction form
    162.09/223.47 = 129.30/x
  3. Step 3: Cross multiply
    162.09x = 223.47 × 129.30
  4. Step 4: Simplify right side
    162.09x = 28,894.67
  5. Step 5: Solve for x
    x = 28,894.67/162.09
  6. Step 6: Final answer
    x = 178.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.